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    <title>Document</title>
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    <script>
        //1.利用箭头函数来求和
        const getSum = (...arr) => {
            let sum = 0
            for(let i = 0;i < arr.length; i++){
                sum += arr[i]
            }
            return sum
        }
        const result = getSum(2,3)
        console.log(result)
    </script>
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